def after_simulation(ctrltree, datfile, opener, mpart_opener, options):
    print 'comparing measurements'
    import numpy as np
    runid = ctrltree.getroot().attrib['runid']
    url = options.url + '/transferResultAtLocIDs?worker=%s&runid=%s' % (WORKER_ID, runid)
    
    vi = VolumeImage()
    for i in range(3):
        try:
            vi.read(datfile)
        except Exception:
            time.sleep(0.5)
        else:
            break
            
    #~ dbdata = vi.asDecibelData(-130)
    
    result = {}
    print 'all locations: ', ctrltree.getroot().xpath('locations/loc')
    for e in ctrltree.getroot().xpath('locations/loc'):
        locid, x, y, z = e.attrib['id'], e.attrib['x'], e.attrib['y'], e.attrib['z']
        #estimated = vi.data[vi.translate(float(x), float(y), float(z))]
        estimated = vi.getPoint(float(x), float(y), float(z))
        print 'loc id:', locid, estimated
        
        #~ if np.isnan(estimated):
            #~ result[locid] = -130
        #~ else:
        result[locid] = estimated
        
    params = urllib.urlencode({'data': str(result)}) # transfer string repr of dict
    
    try:        
        opener.open(url, data=params)
    except Exception:
        log.exception('cannot send data to %s' % url)
    else:
        log.info('transmitted locid data')